Very cool. I'm not a 40K gamer but grav tanks and big stompy robots... What's not to like?
Well Big stompy robots - thats what.
I have a particular hatred of anthropomorphising robots . Liekwise I have zero interest in scifi game mechanics that have tanks engaging less than two tank-lengths from the enemy and everyone rushing into the middle to hit things because its more effective than shooting.
Having got that off my chest - big thumbs up to the paint jobs on the initial pictures - always good to see well painted scifi. And if WH40k is your thing - then good for you - enjoy! :-)